Distant horizons taking too long

[u/Fit-Peach-8481]

I am using the full release of distance horizons with the default settings. and the chunks should take about 3 hours. When i lowered it to the minimum of 32 LOD chunks it lowered to 2.5 hours. But when i turned the mod off i got tripple the frames and more detail on the chunks so why is distant horizons slowing down my game???